/Engine/Source/Runtime/SlateCore/Public/Layout/Children.h
AFChildrenthat has only one child and support alignment and padding.
template<EInvalidateWidgetReason InPaddingInvalidationReason> class TSingleWidgetChildrenWithBasicLayoutSlot : public [TSingleWidgetChildrenWithSlot< TSingleWidgetChildrenWithBasicLayoutSlot< InPaddingInvalidationReason > >](API\Runtime\SlateCore\Layout\TSingleWidgetChildrenWithSlot), public [TPaddingSingleWidgetSlotMixin< TSingleWidgetChildrenWithBasicLayoutSlot< InPaddingInvalidationReason >, InPaddingInvalidationReason >](API\Runtime\SlateCore\Layout\TPaddingSingleWidgetSlotMixin), public [TAlignmentSingleWidgetSlotMixin< TSingleWidgetChildrenWithBasicLayoutSlot< InPaddingInvalidationReason > >](API\Runtime\SlateCore\Layout\TAlignmentSingleWidgetSlotMixin)